Promptkoi

Synthwave Dragon Thumbnail

Stable Diffusion
By Varun Sharma Tested with Stable Diffusion SDXL 1.0

Synthwave Dragon Thumbnail is a tested Stable Diffusion SDXL 1.0 prompt for youtube thumbnails work. It runs at Stable Diffusion SDXL 1.0 · Aspect ratio 16:9 · Steps 30 · CFG scale 6 · Sampler DPM++ 2M Karras, and ships below with the exact prompt text, usage notes, and 2 pasteable variations.

Last tested: July 2026 with Stable Diffusion SDXL 1.0

Part of the Stable Diffusion prompt library.

Remix in builder
Synthwave thumbnail with a black dragon silhouette over a neon grid and striped retro sun, dark title band on top
Synthwave Dragon Thumbnail — Stable Diffusion SDXL 1.0, Aspect ratio 16:9

Prompt 

Synthwave YouTube thumbnail, a bold black dragon silhouette centered on a glowing striped retro sun, neon magenta and cyan glow, a wireframe grid receding to a low horizon, a dark empty sky across the top reserved for a title, high-contrast 80s retro-futuristic style

Negative prompt 

text, letters, watermark, logo, detailed dragon face, low contrast, muddy colors, cartoon, blurry

Settings

Model
Stable Diffusion SDXL 1.0
Aspect ratio
16:9
Steps
30
CFG scale
6
Sampler
DPM++ 2M Karras

How to use this prompt

A thumbnail has to punch at 120 pixels wide, so make the dragon a single high-contrast silhouette against the glowing sun — "bold black dragon silhouette centered on the sun" — rather than a detailed dragon, which turns to mush when YouTube shrinks it. The synthwave sun needs its trademark horizontal scanline gaps, so ask for a "striped retro sun"; without that cue it's just a generic orange circle. Hold the neon to the magenta-and-cyan pair for the 80s glow, and let the wireframe grid recede to a low horizon so the sun and dragon own the frame. Reserve a darker band across the top for your title, or the composition centers and leaves nowhere for text.

Variations to try

  • Swap the dragon for a neon phoenix rising off the grid horizon with trailing embers
  • Recolor to icy cyan-and-white for a frost-dragon winter gaming series
synthwave neon youtube thumbnails gaming

What to do next

Adapt it →

Open this prompt in the Stable Diffusion builder, pre-filled, and change one layer at a time.

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Browse the full Stable Diffusion prompt library — every entry tested with its settings.
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For developers — copy this prompt as JSON 
{
  "title": "Synthwave Dragon Thumbnail",
  "prompt": "Synthwave YouTube thumbnail, a bold black dragon silhouette centered on a glowing striped retro sun, neon magenta and cyan glow, a wireframe grid receding to a low horizon, a dark empty sky across the top reserved for a title, high-contrast 80s retro-futuristic style",
  "negative_prompt": "text, letters, watermark, logo, detailed dragon face, low contrast, muddy colors, cartoon, blurry",
  "model": "Stable Diffusion",
  "model_version": "SDXL 1.0",
  "settings": {
    "aspect_ratio": "16:9",
    "steps": 30,
    "cfg": 6,
    "sampler": "DPM++ 2M Karras"
  },
  "style_tags": [
    "synthwave",
    "neon"
  ],
  "use_case_tags": [
    "youtube-thumbnails",
    "gaming"
  ],
  "source_url": "https://promptkoi.com/prompts/stable-diffusion/synthwave-dragon-thumbnail/"
}

The whole library is available as an open JSON dataset · developer docs.